Do you know the difference between "I have been studying" and "I had been studying"? What about "I study" versus "I am studying"? English verb tenses express specific information about the timing of events or actions; they are also one of the most difficult parts of the language for non-native speakers to master. If verb tenses are giving you a headache, join us to learn about tenses that commonly cause problems for non-native—and even native—speakers and writers of English.